Retard device



5. A. FERRIS .RETARD DEVICE Dec. 6, 1932.

Filed May 9, 1930 INVENTOR. ER w; A. FERR/s &.

ATTORNEYS.

Patented Dec-.6, 1932 UNITED STATES ERVIE A. FERRIS, or wn s rwoon, oenmonm'e I RETARD 'nn'vrcn g j 7 Application filed May 9, 1930. Serial No. 451,158.

My invention relates to improvements in fluid-conveying pipe 9 is threaded into-the retard devices, and it consists in the combinaopposite end of the passageway 2. The purtions, constructions and arrangements hereqpose ofthe piston tis to restrictthe passageinafter described and claimed. way 2 for slowing up theflow 'of fluid from 5 An object of my invention is to provide a V the pipe8 into the pipe 9. v v f retard device which is an improvement over It willhe noted that the piston 4 hasa a similar device shown in my co-pending ap- -plunger 10,,that is slidably receivedin abore plication Serial No. 286,399 filed June 18, -11 whichin turn connects the passageway.2 1928, on tong dogs for saw mill carriages. with thew-cylinder 3.. A shoulder:12 is'pro- In said application a retard device formed vided on the plunger 10 and limits the move-.5 an integral part with a casting having a plument of the plunger into the passageway 2. rality of valves. The present device may be "I have'shown the plunger as beingfully exused on any fluid pressure cylinder where it -rtended'into the passageway 2 in Figure 1. is necessary to have high and slow speed Cup-shaped members 13 and 14 forming 15 strokes of the piston. :ja. part oft-he piston 4 are separated fr om In the present invention the retard device each other bya disc 15, and all three. members is a separate unit, and it employs novel means =,areconnected to the plunger. 10 by a screwflfi.

for regulating the flow of air or other fluid "The'head of the screw bears against a block from a small amount to a large amount. In 17. which inturnis seatedhin the'qcup '14:.

addition to this, adjustable means is provided 1 Parts 10, 13, 14,;-15-, 16 and 17 "move as a unit. :1

for restricting the size of the fluid passage- .Ialso providemanually adjustable means way. The device has one moving part, and for restricting the passageway 2. A screw 18 this part moves in one direction by gravity 1s threaded into the casting 1 and has its in with the aid of the pressure of the fluid in nor "end adaptedto" enter the passageway 2..

trying to go through the partially restricted A look. nut'19 is provided'onthe screw, ands-l passageway. this nut may be moved intolocking position A further object of my invention is to proafterhth'e screw has-been adjusted. In Figvide a device of the type described which is ure 1 I show the screw as partially entering extremely simple in construction and which the passageway 2. o is durable and eificient for the purpose in- From the foregoing description of the vari-sz. t nded, ous parts of the device, the operation thereof Other objects and advantages will appear may be readily understood. as the specification proceeds, and the novel The fluid to be controlled flows through features of the device will be particularly the pipes 8 and 9 and the passageway 2. The pointed out in' the claims hereto annexed. flow may be in either direction. Fluid is also My invention is illustrated in the accomdeslgned to enter the pipe 7 at the will of panying drawing,in which: the operator or by automatlc means (not Figure 1 is a vertical section through the shown) for l1ft1ng the plston 4 intothe full device, portions being shown in elevation, llne position shown in Flgure 1. Th1s causes Figure 2 is a side elevation, and the plunger 10 to enter the passageway 2 and i-9Q Figure 3 is a top plan view. to restrict the flow of fluid through the pas- In carrying out my invention I provide a sageway. The fluid will thus be restricted so casting 1 having a fluid passageway 2 therein long as the piston 4 is maintained in raised and a cylinder 3 for receiving a piston inposition. The freeing of the pressure on the dicated generally at 4. The bottom of the fluid in the pipe 7 will permit the piston 49- casting is'threaded as at 5 and receives a cap to drop by gravity. The pressure of the fluid 6 which in turn carries a fluid-conveying in the passageway 2 will be equal in all dipipe 7. rections, and therefore this fluid will press A fluid-conveying pipe 8 is threaded into agalnst the top of the plunger 10 and will aid 50 one end of the passageway 2, and a second in moving the plunger into its lowermost po sition. When the plunger is in this position, the passageway 2 is unrestricted except for that portion of the screw 18 that extends into the passageway.

The screw 18 is designed for permanently restricting the passageway to the desired ex- I tent. It is obviousthat if the operatorwishes,

the screw 18 may be moved -in to thepassageway 2 until it abuts the plunger 10 when the latter is in raised position. 7/ This would out 01f the flow of fluid through thepassagewa 2. The drawing illustrates a mere restrlcting of the passageway 2 when the plunger 10 is fully raised. 7 7 s V The device is extremely simple in construction and is designed to be automatically actuated when used in connection with the device set forth in the application referred to in the first part of the specification.

Although I have shown and described one embodiment of my invention, it is to be understood that the same is susceptible of various changes, and I reserve the 'rlght to employ such changes as may come within the 1 scope of the claims hereto annexed. .Iclaim: V V

A fluid control device comprising a body havinga passage for fluid, a plunger extending at right angles to the passage and designed to be moved into the passage for cutting down the flow of fluid therethrough, a

piston connected to the'plunger and actuated v Lby fluid for moving the plunger, and a' manually adjustable passageway-restricting down the size of the passage and adapted to serve as a stop for the movement of the plungver in one direction. I.

. "Signed at Westwood in the county of Las- 7 son and State of California this 1st day of May, A. 1930. v v A. FERRIS.'

member movable into the passage for cutting 

